Gas-fired industrial furnace temperature control method and system

Abstract

The invention relates to a temperature control method and system for a fuel gas type industrial furnace. The temperature control method and system are designed for realizing accurate control and saving the energy. According to the temperature control method for the fuel gas type industrial furnace, the combustion time of nozzles is calculated on the basis of the temperature inside the fuel gas type industrial furnace and through the predictive compensation control algorithm, and combustion of the nozzles is controlled according to the combustion time. The temperature control system for the fuel gas type industrial furnace comprises temperature sensors, a signal conversion module receiving the temperature signals, converting the temperature signals into signals capable of being used by an industrial personal computer and outputting the signals, the industrial personal computer receiving the signals output by the conversion module, calculating the combustion proportion of the nozzles within the control period on the basis of the detection temperature and through the predictive compensation control algorithm, calculating the combustion time of the nozzles according to the combustion proportion and outputting time signals indicating the combustion time, nozzle controllers receiving the time signals and outputting control signals according to the time signals, and valves receiving the control signals and acting correspondingly for controlling combustion of the nozzles.

Description

technical field [0001] The invention relates to the technical field of temperature control, in particular to a temperature control method and system for a gas-fired industrial furnace. Background technique [0002] Heat treatment is the most important and energy-intensive key link in the whole life cycle of product manufacturing, and it is also the key link to obtain the best performance of the product. It has not been paid attention to by the field of manufacturing technology for many years. According to statistics, in the industrial mold manufacturing industry, 100% of its products have to go through heat treatment, and in the vehicle manufacturing industry, 70% to 80% of the parts have to go through the heat treatment process. Considering the aspect of energy saving, more and more vehicle manufacturers use gas as the energy supply for heat treatment. Gas-fired industrial furnace is the most commonly used equipment for heat treatment of parts in vehicle enterprises, and i...

AI Technical Summary

Problems solved by technology

At present, the temperature control method of gas-fired industrial furnace mainly relies on the temperature control instrument or control circuit and the timing control of the burner. It can meet the design requirements, but its energy-saving effect is poor; secondly, the timing control of the burner is difficult to achieve perfect coordination with the PID control mode; thirdly, the flame temperature of the burner is often higher than the process (control) temperature, and the current control method is difficult to solve Coupling problem between burner and temperature measuring point

As a result, the temperature control effect of the gas-fired industrial furnace is not ideal, the temperature control accuracy is not high, and the energy saving effect is also poor.

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